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Pregunta:
What is the Xylem made off?
Autor: eric_galvaoRespuesta:
It is made from dead cells joined end to end with no walls between them. The hole in the middle is called the Lumen. It has quite thick side walls, made from cellulose which is strong and stiff which therefore gives the plant support. They are also coated with Lignin, a material which doesn't rot the wall.
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